FAST '23 - CJFS: Concurrent Journaling for Better Scalability

CJFS: Concurrent Journaling for Better Scalability

Joontaek Oh, Seung Won Yoo, and Hojin Nam, KAIST; Changwoo Min, Virginia Tech; Youjip Won, KAIST

In this paper, we propose CJFS, \emph{Concurrent Journaling Filesystem}. CJFS extends EXT4 filesystem and addresses the fundamental limitations of the EXT4 journaling design, which are the main cause for the poor scalability of EXT4 filesystem. The heavy-weight EXT4 journal suffers from two limitations. First, the journal commit is a strictly serial activity. Second, the journal commit uses the …

addresses design ext4 fast filesystem journal main poor scalability tech virginia